Herramienta para crear WorkSheet de caracteres chinos. V2

Crea un PDF (formato A4) para practicar la escritura de caracteres chinos.

Document title:
Characteres para la practica:	Inserte los caracteres en el orden en que desea que aparezcan en el PDF. Habrá 11 caracteres por página. La aplicación eliminará todos los caracteres excepto los chinos (incluyendo signos de puntuación y letras latinas). Remove duplicates
Number of grayscale support signs:	/10
More options:	Add stroke orders to the characters Add Pīnyīn to the characters Use gridlines Write "姓名：___" (name) on top
Way of receiving PDF:	Download Open in new window/tab Open in current window/tab On mobile phones and tablets, it is recommended to use "Download"
Resulting PDF filename:	.pdf Leave this empty to create the filename automatically from the document title you entered.

: Per character, there are 10 squares for students to practice writing the sign (and one square in front of them displaying the sign). In how many of those 10 squares should the sign be written in grayscale to support practicing? Lower numbers for more advanced students.
: With gridlines:
vs.

vs. without gridlines:
: You might have to allow pop-ups for this page. Further, if this settings results in a new window or tab depends on your browser (settings).
: Sometimes, the created PDF document looks slightly different in the browser's preview. To see the actual result, open it in you favorite desktop PDF viewer. (You can still save the document when choosing one of the window/tab options. Simply hit Ctrl+S or right click and choose "Save Page as...".)

Hanzi Writer as a source of the stroke orders and a library to turn them into vector graphics.
Glosbe API to create Pīnyīn from the characters,
and cors.io to do that with Javascript.
yWork's fork of jsPDF to create the PDFs dynamically and their svg2pdf.js utility to include the stroke order vector graphics.
normalize.css for the looks.
jQuery for coding.
Some code for fancy "loading dots".
AR PL UKai CN (available here) as a Chinese font.
- Note that this is an open source project, therefore it is dependent on open source fonts (unlike said paid website, which uses Microsoft's proprietary KaiTi). AR PL UKai does not seem to be developed anymore. Yet, AR PL UKai CN seems to be the best choice in open source regular script fonts.
  Do you know some better open source, regular script font? Please file an issue suggesting it!
Noto Sans as a Pīnyīn font.

Thank you to everybody who contributed to those projects and thereby made this one possible!